/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/ConvexHalfEdgeStructureData.h
Get the index of one of the vertices bounding the specified plane PlaneIndex must be in range [0,NumPlanes()) PlaneVertexIndex must be in [0, NumPlaneVertices(PlaneIndex)) return value is in [0,NumVertices())
int32 GetPlaneVertex ( int32 PlaneIndex, int32 PlaneVertexIndex ) const